Any advice?

[TegGSR96]

Well my day hasnt been going very well..
i wake up this morning, back out of my driveway, i can hear a noise (sounds like im driving with a flat) so i stop, the tire looks a little underdeflated but not bad.. i fill it up, drive a bit, it makes the noise that im driving with a flat, and then when i brake, it sounds like my rim is scrapping the ground or something.. i get out and check, rim, and tire are fine, but the noise is there..i said f*ck it and parked the car.. check it out, theres notin stuck or wrong with my tire.. it sounds flat when im driving and totally aweful when i brake..i also noticed the rim where im hearing the noise, is BLACK with brake dust.. and my others are clean..
Im getting it towed tomorrow, but was hoping for a bit of feedback for what to expect...
I was thinking maybe a problem with the brake pad or a seized caliper (would explain the braking, but when im driving normally it makes a weird noise also).. could it be an axle or wheel bearing?
i think my info is a little limited, so it may be hard to diagnose this problem like this but i was hoping for a bit of feedback.. if someone has had this type of problem b4 please let me know
Sorry for the long post.
Alex

[randyman]

did u check ur brake pads? one might be all worn out and the caliper is making the contact to the rotor, making the "metal-on-metal-grinding" noise.

[TegGSR96]

i didnt get a chance to, i was late for school, and i got home and had to do a physics lab report.. ill check it out tomorrow night.. but would that explain the noise im hearing when i drive normally tho? it sounds like i have a flat tire..
would that also explain the insane amount of brake dust on that one rim (its totally black)
edit: i talked to someone with the same problem it was the drive axle and wheel bearing that needed to be replaced cost 450$ (canadian) -- would drive axle + wheel bearing problem cause the black rim effect?
... hope its just a caliper/brake pad problem..
Alex